1. Occupational Health Service, University Hospital Center of Saint-Etienne, 42055 Saint-Etienne, France
2. Public Health Service, University Hospital Center of Saint-Etienne, 42005 Saint-Etienne, France
3. Department of Infectious Agents and Hygiene, University-Hospital of Saint-Etienne, 42055 Saint-Etienne, France
4. Infectious Diseases Department, University Hospital of Saint-Etienne, 42055 Saint-Etienne, France
5. University Lyon 1 University de St Etienne University Gustave Eiffel—UMRESTTE UMR_T9405, 42005 Saint-Etienne, France